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shape   parameter
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  相似匹配句对
     (2)C shape;
     C型 ;
短句来源
     Shape * Shadow
     形*影
短句来源
     Results shown:1.Shape atypical:A. Mottled;
     1.形态不典型:A.斑片状HHE;
短句来源
     Effect of flowfield state on wind load shape coefficient of aqueduct structure
     流场状态对渡槽槽体结构风载体形系数的影响
短句来源
     conclusion  ①.
     结论  ①.
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A transcendental function which can be used to express the shape of body sectionis presented here.Fair ship surface is formed by a set of hull lines.With the properparallel principal dimensions and ship form coefficients,and by suitable modificationof some shape parameters,ship's lines of various shapes can be readily obtained.Theseship lines can be selectively adopted by designers in their practical work.A practicalmethod of designing transverse sectional area curve in cooperation with...

A transcendental function which can be used to express the shape of body sectionis presented here.Fair ship surface is formed by a set of hull lines.With the properparallel principal dimensions and ship form coefficients,and by suitable modificationof some shape parameters,ship's lines of various shapes can be readily obtained.Theseship lines can be selectively adopted by designers in their practical work.A practicalmethod of designing transverse sectional area curve in cooperation with other longitu-dinal function is also proposed here.In addition,the transcendental function graphswhich can be used to better express water lines and transverse sectional area curveare illustrated.

本文提出了用一种超越函数表示横剖线,并用形成一组横剖线,构造出光顺的船体曲面。在相同的船舶主尺度和船型系数条件下,通过一些形状参数灵活调整,可以迅速得到不同形状的船体线型,以供设计人员选择使用。文中还对形成横剖面面积曲线和其它纵向函数之间的协调配合提出了一种实用设计方法。最后提供了能较好表达水线、横剖面面积曲线的一种超越函数曲线簇图形。

In this paper the united expression of the product,terms of the elements of the state transition matrix eDt is derived from Cayley-Hamilton theorem,and the concepts of the coefficient matrix E and the shape parameter matrix k[s],λr[i],λi[i] are introduced.So the matrix eDt can be expressed in terms of the united expression,the coefficient matrix E and the shape parameter matrixes.Thus the theory suited for comuter calculation is obtained.Based on this theory,the method for finding the...

In this paper the united expression of the product,terms of the elements of the state transition matrix eDt is derived from Cayley-Hamilton theorem,and the concepts of the coefficient matrix E and the shape parameter matrix k[s],λr[i],λi[i] are introduced.So the matrix eDt can be expressed in terms of the united expression,the coefficient matrix E and the shape parameter matrixes.Thus the theory suited for comuter calculation is obtained.Based on this theory,the method for finding the analytic solution of the state transition matrix is suggested.Therefore the accurate analytic expression can be obtained conveniently with computers.Compared with the series solution,this method,with the absence of the problems of step,recurrence,accumulation error and convergence,has the advantages,of forthright and accuracy.This has been proved by the results of calculation.

本文根据Cayley-Hamilton定理推导出状态转移矩阵e~(Dt)各元素中乘积项的统一形式。并提出系数矩阵E和形状参数矩阵k[i],λ_i[i],λ_d[i],d[i]的概念,使e~(Dt)能由元素块的统一形式、系数矩阵、形状参数矩阵表示出来。从而,完成了适用于计算机运算的理论基础。 在此基础上,提出了用计算机求状态转移矩阵e~(Dt)解析解的方法。从而能用计算机比较方便地得到e~(Dt)的精确解析式。 此方法和级数解法比较,因无步长,递推,收敛和积累误差等问题,因而在原理和方法上保证了具有简捷、精确的优点。计算结果也证明了这一点。

The mechnical strength of optical fibers is one of the major areas requiring evaluationbefore their possible use in telecommunication applications. In this paper, the tensilestrength of optical fibers drawn from graphite resistance furnace and coated with UV-curedepoxy acrylate resin is presented.The data are analysed with Weibull statistical distribu-tion. The results of experiment indicate that strength is improved by the combination ofthe fused quartz supporting tube of better quality and fire-polished preform-surface....

The mechnical strength of optical fibers is one of the major areas requiring evaluationbefore their possible use in telecommunication applications. In this paper, the tensilestrength of optical fibers drawn from graphite resistance furnace and coated with UV-curedepoxy acrylate resin is presented.The data are analysed with Weibull statistical distribu-tion. The results of experiment indicate that strength is improved by the combination ofthe fused quartz supporting tube of better quality and fire-polished preform-surface. Themeasurements of short term strength of specimens of 0.5m gauge length show that theminimum value is 2.2GN/m~2, and the arithmetic mean value is 3.8GN/m~2.The single modedistribution of some optical fibers has been observed, its shape parameter m being about7. The failure of these fibers can be attributed to the contamination of furnace while thefiber is being drawn.The strength data extrapolated show that at failure probability about2.5%, the breakage load of fiber of 1 km gauge length could be 1 kg.

在光纤应用于光通信之前必须对它的机械强度作出评价。本文介绍炉拉法光固化树脂涂复的石英光纤,由于采用质量较好的石英玻璃支撑管和火法抛光,使其强度有了明显的改善。对于0.5m测量长度试样的快破断强度测定结果表明:最小值为2.2GN/m~2,算术平均值为3.8GN/m~2。在强度数据的韦布尔统计分布处理中出现了单模分布图型,形状参数m为7左右。我们认为这种纤维的破坏可能要归因于炉拉污染。外推结果表明:在破坏几率大约为2.5%时,1km长的纤维的破断力可达1kg。

 
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